Method for assembling a multi-domain liquid crystal display device having field affecting electrode

ABSTRACT

The present multi-domain liquid crystal display device includes first and second substrates facing each other, a liquid crystal layer between the first and second substrates, a plurality of gate bus lines arranged in a first direction on the first substrate and a plurality of data bus lines arranged in a second direction on the first substrate to define a pixel region, a thin film transistor positioned at a crossing area of the data bus line and the gate bus line and comprising a gate electrode, a semiconductor layer, and source/drain electrodes, a pixel electrode in the pixel region, a subsidiary electrode on the second substrate, a color filter layer on the subsidiary electrode, a common electrode on the color filter layer, and an alignment layer on at least one substrate between the first and second substrates.

This application is a Continuation of application Ser. No. 09/357,247filed on Jul. 20, 1999 now U.S. Pat. No. 6,449,025.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a liquid crystal display device (LCD),and more particularly to a multi-domain liquid crystal display devicecapable distorting electric field and shielding light.

2. Description of the Related Art

Recently, a LCD has been proposed where the liquid crystal is notaligned and the liquid crystal is driven by side electrodes insulatedfrom pixel electrodes. FIG. 1 is a sectional view of pixel unit of theconventional LCDs.

Regarding conventional LCDs, a plurality of gate bus lines arranged in afirst direction on a first substrate and a plurality of data bus linesarranged in a second direction on the first substrate divide the firstsubstrate into a plurality of pixel regions.

A thin film transistor (TFT) applies image signal delivered from thedata bus line to a pixel electrode 13 on a passivation layer 4. The TFTis formed on each pixel region and comprises a gate electrode, a gateinsulator, a semiconductor layer, a source electrode, and a drainelectrode, etc.

Side electrode 15 is formed surrounding the pixel electrode 13 on thegate insulator, thereon passivation layer 4 is formed over the wholefirst substrate, and a part of pixel electrode 13 overlaps sideelectrode 15.

Alternatively, pixel electrode 13 is formed on the gate insulator andpassivation layer 4 is formed over the whole first substrate. Afterward,side electrode 15 is formed as overlapping a part of pixel electrode 13.Moreover, it is possible to pattern the pixel electrode 13 by etchingand dividing the pixel region.

On a second substrate, a common electrode 17 is formed and together withpixel electrode. 13 applies electric field to a liquid crystal layer.Side electrode 15 and open area (slit) 19 distort the electric fieldapplied to the liquid crystal layer. Then, liquid crystal molecules arevariously driven in a unit pixel. Thus, when voltage is applied to theLCD, dielectric energy due to the distorted electric field arranges theliquid crystal directors in a needed position.

In the LCDs, however, open area 19 in common electrode 17 or pixelelectrode 13 is necessary, and the liquid crystal molecules could bedriven stably when the open area is wider. If the electrodes do not havea slit or the width of the slit is narrow, the electric field distortionneeded to divide the pixel region becomes weak. Then, when voltage overa threshold voltage, V_(th), is applied, the time needed to stabilizethe liquid crystal directors increases.

In particular, the response time can be over 100 msec. At this time,disclination occurs from the area where the liquid crystal directors areparallel with a transmittance axis of the polarizer, which results in adecrease in brightness. Further, according to the surface state of LCDs,the liquid crystal texture has an irregular structure.

SUMMARY OF THE INVENTION

Accordingly, the present invention is directed to a LCD thatsubstantially obviates one or more problems due to limitations anddisadvantages of the related art.

An object of the present invention is to provide a LCD having a wideviewing angle from a multi-domain effect.

Another object of the present invention is to provide a LCD having highbrightness by stable arrangement of liquid crystal molecules.

Additional features and advantages of the invention will be set forth inthe description which follows, and in part will be apparent from thedescription, or may be learned by practice of the invention. Theobjectives and other advantages of the invention will be realized andattained by the structure particularly pointed out in the writtendescription and claims hereof as well as the appended drawings.

To achieve the objects and in accordance with the purpose of theinvention, as embodied and broadly described herein, a multi-domainliquid crystal display device comprises first and second substratesfacing each other; a liquid crystal layer between the first and secondsubstrates; a plurality of gate bus lines arranged in a first directionon the first substrate and a plurality of data bus lines arranged in asecond direction on the first substrate to define a pixel region; a thinfilm transistor positioned at a crossing area of the data bus line andthe gate bus line and comprising a gate electrode, a semiconductorlayer, and source/drain electrodes; a pixel electrode in the pixelregion; a field-affecting electrode on the second substrate; a colorfilter layer on the field affecting electrode; and a common electrode onthe color filter layer.

In another aspect, the multi-domain liquid crystal display of thepresent invention comprises first and second substrates facing eachother; a liquid crystal layer between the first and second substrates; aplurality of gate bus lines arranged in a first direction on the firstsubstrate and a plurality of data bus lines arranged in a seconddirection on the first substrate to define a pixel region; a thin filmtransistor positioned at a crossing area of the data bus line and thegate bus line and comprising a gate electrode, a semiconductor layer,and source/drain electrodes; a pixel electrode in the pixel region; asubsidiary electrode on a the second substrate; a color filter layer onthe subsidiary electrode; a common electrode on the color filter layer;and an alignment layer on at least one of the first and secondsubstrates.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and areintended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of the specification, illustrates embodiments of the invention andtogether with description serve to explain the principles of theinvention.

In the drawings:

FIG. 1 is sectional view of the liquid crystal display device in therelated art;

FIGS. 2A to 2E are plan views of the multi-domain liquid crystal displaydevices according to the embodiments of the present invention;

FIGS. 3A to 3H are more plan views of the multi-domain liquid crystaldisplay devices according to the embodiments of the present invention;

FIGS. 4A to 4D are sectional views of the multi-domain liquid crystaldisplay devices according to the first, second, third, and fourthembodiments of the present invention;

FIG. 5 is a plan view of the multi-domain liquid crystal display deviceaccording to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, the multi-domain liquid crystal display device of thepresent invention is explained in detail by accompanying the drawings.

FIGS. 2A to 2E and FIGS. 3A to 3H are plan views of the multi-domainliquid crystal display devices according to the embodiments of thepresent invention, and FIGS. 4A to 4D are sectional views of themulti-domain liquid crystal display devices according to the first,second, third, and fourth embodiments of the present invention.

Referring to the figures, the multi-domain liquid crystal display deviceof the present invention comprises first and second substrates 31, 33, aplurality of gate bus lines 1 arranged in a first direction on firstsubstrate 31 and a plurality of data bus lines 3 arranged in a seconddirection on the first substrate, a thin film transistor (TFT), apassivation layer 37, and a pixel electrode 13.

Data bus lines 3 and gate bus lines 1 divide the first substrate into aplurality of pixel regions. The TFT comprises a gate electrode 11, agate insulator 35, a semiconductor layer 5, an ohmic contact layer 6,and source/drain electrodes 7, 9. Passivation layer 37 is formed on thewhole first substrate 31. Pixel electrode 13 is coupled to drainelectrode 9 and overlapped the TFT and/or data bus lines 3, and gate buslines 1 on passivation layer 37.

The present invention comprises a subsidiary or auxiliary electrode 27.The subsidiary electrode 27 distorts electric field. The subsidiaryelectrode 27 may also shields light from leaking at gate bus lines 1,data bus lines 3, and the TFT. A color filter layer 23 is on thesubsidiary electrode 27, and a common electrode 17 is on the colorfilter layer 23. A liquid crystal layer is between first and secondsubstrates 31, 33.

In the LCD, a passivation layer 37 may be formed to prevent a shortbetween subsidiary electrode 27 and common electrode 17. The passivationlayer 37 also prevents a decrease in the reliability due to the reactionof color filter layer 23 and the liquid crystal layer. Moreover,referring to FIG. 4B, an overcoat layer may be formed between the colorfilter layer 23 and the common, electrode 17.

Subsidiary electrode 27 is formed preferably from a material having goodconductivity, such as Cr. A voltage supply such as an operationalamplifier may be used to provide amplified signals to apply voltages.

For example, for a driving voltage of 5V, pixel electrode 13 is appliedwith |0˜5|V, common electrode 17, V_(com), is at 0V, and subsidiaryelectrode 27 is applied with |V_(com)−α|V. Here, α is preferably in arange of 0<α<V_(op) (operating voltage), and more preferably in a rangeof 0<α<V_(th) (threshold voltage).

If α is a large value in the given range, the potential differencebetween common electrode 17 and subsidiary electrode 27 is largecorrespondingly and the distortion effect of the electric field formedin the LCD is increased.

As an another example, for a driving voltage of 10V, pixel electrode 13is applied with 0˜10V, common electrode 17, V_(com), is at 5V, andsubsidiary electrode 27 is applied with |V_(com)−α|V. Here, α ispreferably in a range of |5−α|>0.

If α is a large value in the given range, the potential differencebetween common electrode 17 and subsidiary electrode 27 is largecorrespondingly and the distortion effect of the electric field formedin the LCD is increased.

To manufacture the LCD, in each pixel region on the first substrate 31,a TFT is formed comprising gate electrode 11, gate insulator 35,semiconductor layer 5, ohmic contact layer 6 and source/drain electrodes7, 9. A plurality of gate bus lines 1 and a plurality of data bus lines3 are formed to divide the first substrate 31 into a plurality of pixelregions.

Gate electrode 11 and gate bus lines 1 are formed from depositing bysputtering and patterning a metal such as Al, Mo, Cr, Ta or Al alloy.Alternatively, it is possible to form the gate electrode and gate busline as a double layer, the double layer is formed from differentmaterials. Gate insulator 35 is formed from depositing by PECVD andpatterning an insulating material such as SiN_(x) or SiO_(x).

Semiconductor layer 5 and the ohmic contact layer 6 are formed fromdepositing by PECVD (Plasma Enhancement Chemical Vapor Deposition) andpatterning amorphous silicon (a-Si) and doped amorphous silicon (n⁺a-Si). Also, gate insulator 35, amorphous silicon (a-Si), and dopedamorphous silicon (n⁺ a-Si) are formed by PECVD and patterned. So, gateinsulator 35, semiconductor layer 5, and ohmic contact layer 6 areformed.

Data bus line 3 and source/drain electrodes 7, 9 are formed bysputtering and patterning a metal such as Al, Mo, Cr, Ta, Al alloy, etc.Alternatively, it is possible to form the data bus line 3 andsource/drain electrodes 7, 9 as a double layer, the double layer isformed from different materials.

Passivation layer 37 is formed with a material such as BCB(BenzoCycloButene), acrylic resin, polyimide-based material, SiN_(x) orSiO_(x). Pixel electrode 13 is formed by sputtering and patterning ametal such as ITO (indium tin oxide). A contact hole 39 is formed toconnect the pixel electrode 13 to the drain electrode 9 and storageelectrode (not shown in the figure) by opening and patterning a part ofthe passivation layer 37 on drain electrode 9.

In the pixel electrode 13 or the passivation layer 37, an electric fieldinducing window 51 like a slit or hole is formed to distort the electricfield (refer to the FIGS. 4A and. 4B) The electric field inducing window51 in FIGS. 4C and 4D may extend to the substrate 31, especially if thegate insulator 35 is performed by patterning shallowly or deeply.

Alternatively, the hole 51 (FIG. 4B) in the passivation layer 37 may bea recess that does not extend all the way to the gate insulator 35, andthe hole 51 (FIG. 4C) in the passivation layer 37 and the gate insulator35 may be a recess that does not extend all the way to the substrate 31.Moreover, source/drain electrodes 7, 9 are electrically connected topixel electrode 13 through contact hole 39.

On second substrate 33, subsidiary electrode 27 is formed fromdepositing by sputtering and etching a metal. Color filter layer 23 isformed with R, G, B (Red, Green, Blue) elements repeatedly on eachpixel. Subsidiary electrode 27 includes a metal having a goodconductivity, and preferably Cr.

Overcoat layer 29 is formed on color filter layer 23, preferably fromresin. Common electrode 17 is formed from depositing ITO by sputteringand patterning. The liquid crystal layer is formed by injecting liquidcrystal between first and second substrates 31, 33. The liquid crystallayer comprises liquid crystal molecules having positive or negativedielectric anisotropy, and chiral dopants may be added thereto.

In pixel electrode 13, a multi-domain effect can be obtained by formingelectric field inducing window 51 like a slit or hole. Slit is made byetching pixel electrode 13, and hole is made by etching a portion of thepassivation layer or gate insulator and depositing the pixel electrode13.

Referring to FIGS. 2A to 2E, a two-domain is obtained by dividing eachpixel horizontally, vertically, and/or diagonally, respectively.Referring to FIGS. 3A to 3H, a multi-domain is obtained by dividing eachpixel into four domains such as “+”, “x”, or double “Y” shapes. Othershapes are contemplated by the present invention for achievingmulti-domain.

It is also possible to form a slit in common electrode 17 on the secondsubstrate 33, such as shown in U.S. patent application Ser. No.09/256,180, entitled “A MULTI-DOMAIN LIQUID CRYSTAL DISPLAY DEVICE” bySeong Moh SEO et al., and filed concurrently with this application,which is hereby incorporated by reference.

To apply voltage (V_(com)) to the subsidiary electrode 27, Ag-dottingpart is formed in each corner of driving area on first substrate 31,electric field is applied with second substrate 33, and the liquidcrystal molecules are driven by the potential difference. A voltage(V_(com)) is applied to subsidiary electrode 27 by connecting theAg-dotting part to the subsidiary electrode 27, which is accomplishedsimultaneously by forming the subsidiary electrode 27.

On at least one substrate, a compensation film 29 is formed withpolymer. The compensation film 29 is a negative uniaxial film, which hasone optical axis, and compensates the phase difference of the directionaccording to viewing-angle. Hence, it is possible to compensateeffectively the right-left viewing-angle by widening the area withoutgray inversion, increasing contrast ratio in an inclined direction, andforming one pixel to multi-domain.

In the present multi-domain liquid crystal display device, it ispossible to form a negative biaxial film as the compensation film, whichhas two optical axes and wider viewing-angle characteristics as comparedwith the negative uniaxial film. The compensation film 29 could beformed on both substrates or on one of them.

After forming the compensation film, polarizer (not shown in the figure)is formed on at least one substrate. At this time, the compensation filmand polarizer are preferably composed as one.

FIG. 5 is a plan view of the multi-domain liquid crystal display deviceaccording to another embodiment of the present invention.

In the multi-domain LCD of the present invention, the aperture ratio isenhanced by an optimum structure design of a “n-line” thin filmtransistor (U.S. Pat. No. 5,694,185) so as to reduce power consumption,increase luminance, and lower reflection, thus improving contrast ratio.Aperture ratio is increased by forming the TFT above the gate line andproviding a “n-line” TFT. The parasitic capacitor, occurring between thegate bus line 1 and the drain electrode 9, can be reduced when aTFT-having the same channel length as the symmetrical TFT structure ismanufactured due to effect of channel length extension.

Furthermore, in the present LCD, an alignment layer (not shown in thefigure) is formed over the whole first and/or second substrates. Thealignment layer includes a material such as polyamide or polyimide basedmaterials, PVA (polyvinylalcohol), polyamic acid or SiO₂. When rubbingis used to determine an alignment direction, it should be possible toapply any material suitable for the rubbing treatment.

Moreover, it is possible to form the alignment layer with aphotosensitive material such as PVCN (polyvinylcinnamate), PSCN(polysiloxanecinnamate), and CelCN (cellulosecinnamate) based materials.Any material suitable for the photo-aligning treatment may be used.Irradiating light once on the alignment layer determines the alignmentor pretilt direction and the pretilt angle. The light used in thephoto-alignment is preferably a light in a range of ultraviolet light,and any of non-polarized light, linearly polarized light, and partiallypolarized light can be used.

In the rubbing or photo-alignment treatment, it is possible to apply oneor both of the first and second substrates. Different aligning-treatmentmay be applied on each substrate.

From the aligning-treatment, a multi-domain LCD is formed with at leasttwo domains and LC molecules of the LC layer are aligned differently oneanother on each domain. That is, the multi-domain is obtained bydividing each pixel into four domains such as in a “+” or “x” shape, ordividing each pixel horizontally, vertically, and/or diagonally, anddifferently alignment-treating or forming alignment directions on eachdomain and on each substrate.

It is possible to have at least one domain of the divided domainsunaligned. It is also possible to have all domains unaligned.

It is possible to apply the LCD of the present invention to anyalignment and mode including, for example, (1) a homogeneous alignmentwhere liquid crystal molecules in the liquid crystal layer are alignedhomogeneously to surfaces of the first and second substrates, (2) ahomeotropic alignment where liquid crystal molecules in the liquidcrystal layer are aligned homeotropically to surfaces of the first andsecond substrates, (3) a tilted alignment where liquid crystal moleculesin the liquid crystal layer are aligned tiltedly to surfaces of thefirst and second substrates, (4) a twisted alignment where liquidcrystal molecules in the liquid crystal layer are aligned twistedly tosurfaces of the first and second substrates, and (5) a hybrid alignmentwhere liquid crystal molecules in the liquid crystal layer are alignedhomogeneously to surface of one substrate between the first and secondsubstrates and are aligned homeotropically to surface of the othersubstrate.

Consequently, since the subsidiary electrode of the present invention isformed to distort electric field and to shield light on the uppersubstrate, it is possible to simplify the electrode patterning processand to ensure good aperture ratio. The distortion effect of electricfield is increased by controlling the voltage of the subsidiaryelectrode, thus obtaining a wide-viewing angle.

Also, with aligning-treatment, a rapid response time and a stable LCstructure can be obtained by the pretilt and anchoring energy produced.Moreover, the disclination is removed to improve brightness.

It will be apparent to those skilled in the art that variousmodifications can be made in the multi-domain liquid crystal displaydevice of the present invention without departing from the sprit orscope of the invention. Thus, it is intended that the present inventioncovers the modifications and variations of this invention provided theycome within the scope of the appended claims and their equivalents.

What is claimed is:
 1. A method for assembling a multi-domain liquidcrystal display device, comprising: positioning first and secondsubstrates facing each other; forming a liquid crystal layer betweensaid first and second substrates; forming a plurality of gate bus linesarranged in a first direction on said first substrate and a plurality ofdata bus lines arranged in a second direction on said first substrate todefine a pixel region; placing a thin film transistor positioned at acrossing area of said data bus line and said gate bus line andcomprising a gate electrode, a semiconductor layer and source/drainelectrodes; positioning a pixel electrode in said pixel region;positioning a field-affecting electrode for having a voltage appliedthereto on said second substrate; placing a color filter layer on saidfield-affecting electrode; and positioning a common electrode on saidcolor filter layer; wherein the field-affecting electrode and the commonelectrode distort electric field applied between said first and secondsubstrate, and whereby the field-affecting electrode is formedsurrounding said pixel region enabling a multi-domain effect within thepixel region.
 2. The multi-domain liquid crystal display deviceaccording to claim 1, wherein said field-affecting electrode is locatedcorresponding to said thin film transistor.
 3. The multi-domain liquidcrystal display device according to claim 1, wherein saidfield-affecting electrode acts as a light shielding layer.
 4. Themulti-domain liquid crystal display device according to claim 1, furthercomprising an alignment layer on at least one substrate between saidfirst and second substrates.
 5. The multi-domain liquid crystal displaydevice according to claim 4, wherein said alignment layer is dividedinto at least two portions, liquid crystal molecules in said liquidcrystal layer corresponding to said two portions are aligned differentlyfrom each other.
 6. The multi-domain liquid crystal display deviceaccording to claim 5, wherein at least one portion of said alignmentlayer is alignment-treated.
 7. The multi-domain liquid crystal displaydevice according to claim 5, wherein all portions of said alignmentlayer portions are non-alignment-treated.
 8. The multi-domain liquidcrystal display device according to claim 5, wherein at least oneportion of said alignment layer is rubbing-treated.
 9. The multi-domainliquid crystal display device according to claim 8, wherein saidalignment layer includes a material selected from the group consistingof polyimide and polyamide based materials, PVA(polyvinylalcohol),polyamic acid, and silicon dioxide.
 10. The multi-domain liquid crystaldisplay device according to claim 5, wherein at least one portion ofsaid alignment layer is photo-alignment-treated.
 11. The multi-domainliquid crystal display device according to claim 10, wherein saidalignment layer includes a material selected from the group consistingof PVCN(polyvinylcinnamate), PSCN(polysiloxanecinnamate), andCelCN(cellulosecinnamate) based materials.
 12. The multi-domain liquidcrystal display device according to claim 10, wherein said at least oneportion is photo-alignment-treated with ultraviolet light.
 13. Themulti-domain liquid crystal display device according to claim 10,wherein said at least one portion is photo-alignment-treated byirradiating light at least one time.
 14. The multi-domain liquid crystaldisplay device according to claim 1, further comprising an overcoatlayer on said color filter layer.
 15. The multi-domain liquid crystaldisplay device according to claim 1, further comprising a gate insulatoron said gate bus lines.
 16. The multi-domain liquid crystal displaydevice according to claim 15, said gate insulator has an electric fieldinducing window.
 17. The multi-domain liquid crystal display deviceaccording to claim 1, further comprising a passivation layer below saidpixel electrode.
 18. The multi-domain liquid crystal display deviceaccording to claim 17, wherein said passivation layer has an electricfield inducing window.
 19. The multi-domain liquid crystal displaydevice according to claim 1, wherein said pixel electrode includes amaterial selected from the group consisting of ITO(indium tin oxide),aluminum, and chromium.
 20. The multi-domain liquid crystal displaydevice according to claim 1, wherein said field-affecting electrodeincludes a metal.
 21. The multi-domain liquid crystal display deviceaccording to claim 20, wherein said metal includes chromium.
 22. Themulti-domain liquid crystal display device according to claim 1, whereinsaid common electrode includes ITO(indium tin oxide).
 23. Themulti-domain liquid crystal display device according to claim 1, whereinsaid pixel region has an electric field inducing window.
 24. Themulti-domain liquid crystal display device according to claim 1, whereinsaid pixel electrode is patterned.
 25. The multi-domain liquid crystaldisplay device according to claim 1, wherein said pixel region isdivided into at least two portions, liquid crystal molecules in saidliquid crystal layer corresponding to said two portions are drivendifferently from each other.
 26. The multi-domain liquid crystal displaydevice according to claim 1, wherein said liquid crystal layer includesliquid crystal molecules having positive dielectric anisotropy.
 27. Themulti-domain liquid crystal display device according to claim 1, whereinsaid liquid crystal layer includes liquid crystal molecules havingnegative dielectric anisotropy.
 28. The multi-domain liquid crystaldisplay device according to claim 1, wherein said liquid crystal layerincludes liquid crystal molecules having chiral dopants.
 29. Themulti-domain liquid crystal display device according to claim 1, furthercomprising: a negative uniaxial film on at least one substrate betweensaid first and second substrates.
 30. The multi-domain liquid crystaldisplay device according to claim 1, further comprising: a negativebiaxial film on at least one substrate between said first and secondsubstrates.
 31. The multi-domain liquid crystal display device accordingto claim 1, wherein said liquid crystal layer includes liquid crystalmolecules aligned homogeneously to surfaces of said first and secondsubstrates.
 32. The multi-domain liquid crystal display device accordingto claim 1, wherein said liquid crystal layer includes liquid crystalmolecules aligned homeotropically to surfaces of said first and secondsubstrates.
 33. The multi-domain liquid crystal display device accordingto claim 1, wherein said liquid crystal layer includes liquid crystalmolecules aligned tiltedly to surfaces of said first and secondsubstrates.
 34. The multi-domain liquid crystal display device accordingto claim 1, wherein said liquid crystal layer includes liquid crystalmolecules aligned twistedly to surfaces of said first and secondsubstrates.
 35. The multi-domain liquid crystal display device accordingto claim 1, wherein said liquid crystal layer includes liquid crystalmolecules aligned homogeneously to a surface of one of said first andsecond substrates and are aligned homeotropically to a surface of theother of said first and second substrates.
 36. A method for assembling amulti-domain liquid crystal display device, comprising: positioningfirst and second substrates facing each other; forming data bus linescrossing on said first substrate; positioning a pixel electrode on saidfirst substrate; forming gate bus lines crossing said data bus lines todefine a pixel region; placing a light shielding subsidiary electrodefor having a voltage applied thereto on said second substrate;positioning a common electrode on said light shielding subsidiaryelectrode; wherein the light shielding subsidiary electrode and thecommon electrode distort electric field applied between said first andsecond substrate, and whereby the light shielding subsidiary electrodeis formed surrounding said pixel region enabling a multi-domain effectwithin the pixel region.
 37. The multi-domain liquid crystal displaydevice according to claim 36, further comprising an n-line thin filmtransistor at a crossing area of said gate and data bus lines.
 38. Themulti-domain liquid crystal display device according to claim 36,further comprising a gate insulator and a passivation layer on saidfirst substrate.
 39. The multi-domain liquid crystal display deviceaccording to claim 38, wherein said gate insulator has an electric fieldinducing window.
 40. The multi-domain liquid crystal display deviceaccording to claim 38, wherein said passivation layer has an electricfield inducing window.
 41. The multi-domain liquid crystal displaydevice according to claim 36, wherein said pixel electrode has anelectric field inducing window.